Rotary pump or engine



April 13, 1954 J. JACOBSEN 2,674,952

ROTARY PUMP OR ENGINE Filed July 2 1951 jigj 6g A /////A x @4 5 4 2 INVENTOR.

Patented Apr. 13, 1954 UNITED STATES PATENT OFFICE ROTARY PUMP R ENGINE Jacob J acobsen, Newark, Calif.

Application July 2, 1951, Serial No. 234,865

2 Claims.

This invention relates to a rotary pump or ensine which may be used as a vacuum pump or compressor or as a liquid pump or engine; the object being to provide a pump or en ine which is simple and compact in construction and efficient in operation.

With the above and other objects in view, the invention consists in the construction, combination and arrangements of parts hereinafter to be more fully described and claimed.

In the drawings which show one form of the pump or engine, Fig. 1 is a side elevation of the pump, said elevation being partially broken away. Fig. 2 is an end view. Fig. 3 is a diagrammatic view showing the contact faces between the two rotors, and Fig. 4 is a vertical, longitudinal section of the pump.

Referring to the drawings in detail and particularly Figs. 1 and 4A indicates a housing section having a bearing 2 and B indicates a housing section having two bearin s one indicated at 3 and the other at 4. The housing sections are suitably secured together as by bolt 5 and extending through the housings and the bearings 2, 3 and 4 is a shaft 6. Secured on the shaft 6 within the housing section A is a rotor l and rotatable within the housing B on hearing 4 is a rotor 8. The rotor 8 is disposed on an angle with relation to rotor l and the shaft 5 and the adjacent faces of the rotors are provided with bevelgear teeth as indicated at l and 8 so that the rotors will rotate in unison in the same manner as a pair of bevelgears when power is transmitted to shaft 6 and rotor 1.

The rotors I and 8 are provided with vanes,

see Fig. 1. The vanes indicated at 9 and It are carried by the rotor 8 and are spaced apart to receive between them a single vane l I carried by the rotor 1. This vane is rounded at its outer end and is comparatively narrow at its inner end, thus the vane is provided with angularly opposed faces while the faces of the vanes 9 and I0 are flat and parallel. Pockets 53 and I0 are formed in rotor l on opposite sides of the vane II to receive the vanes 9 and Ill. The angular faces of the vane l! form one side of each pocket while faces I2 and it. form the opposite side of each pocket. The faces 12 and M are disposed on angles opposite to the angular faces of the vane i l, hence the pockets are widest at their inner ends and narrowest at the outer ends; the angles l2 and I4 and that of the opposed faces of the vane ll depend upon the angle of the rotor 8 with relation to the rotor l. The angular faces of the pockets and the vane H are readily determined when designing a pump or engine of this character as it will be noted that the vanes 9 and ID are disposed at right angles to the face of the rotor 8, hence by turning the rotors ninety degrees from a vertical to a horizontal position as shown in Fig. 1 the angle of the pocket faces and vane faces is determined, as in this: position the greatest angular position is assumed, in all other positions the angular relation will be less and vanes 9 and ill will move freely inwardly and outwardly in the pockets while the vane l I moves freely between the vanes 9 and II].

There are actually three vanes and three pockets; vanes 9 and It telescoping into the pockets 9 and I0 and vane ll into pocket llformed between the spaced vanes 9 and 10. This arrangement of the vanes and the pockets is of great importance and is one of the novel features of the present invention. It is a structural feature which reduces leakage by the vanes to a minimum as leakage if any will have to pass between four contacting surfaces. Two sets of vanes such as shown in Fig. 1 are employed, the other set being diametrically opposite to the vanes shown, but three or more sets may be employed depending upon the size of the pump and its use.

If the pump is being operated for instance to pump oil, water or a like liquid or as a compressor, power will be transmitted to shaft 6 to rotate the rotor I which in turn rotates the rotor 8 through means of the interlocking bevelgear teeth. These teeth perform another important function besides that of a driving connection between the rotors, to wit, that of forming a labyrinth like multiple contact face between the rotors where the gear teeth mesh, see the diagrammatic view Fig. 3. Here several teeth are in contact and as the inlet and exhaust ports I6 and 18 are disposed on opposite sides of the contacting teeth there may be high pressure on one side and a partial vacuum on the other side hence, a great tendency to leak; obviously, leakage is in this instance reduced to a minimum due to the several contacting gear teeth faces.

To prevent leakage around shaft 6 a spherical extension 29 is formed on the rotor 1. This spherical extension seats in a complementary face formed at the inner end of bearing 4. A final important feature of the invention is the position and arrangement of the bearings 2, 3 and 4 which arran ements permit the drive shaft 6 to extend completely through the housing sections A and B. This arrangement or positioning of the bearings simplifies construction and also permits two or more pumps or engines of this character to be coupled in alignment and to be driven by a single shaft. Conventional stufling boxes such as shown at 2| and 24 may be employed, and while ball or anti-friction bearings are not shown they may obviously be employed. Other changes may be resorted to within the scope of the appended claims, and changes in materials and finish may be resorted to depending upon specific use and manufacturing practice.

Having thus described my invention, What I desire to claim and secure by Letters Patent is:

1. In a pump of the character described, a first and a second named rotor disposed on an angle with relation to each other, a pair of spacedapart vanes projecting from the face of the first named rotor, said vanes having flat side faces and said faces being parallel with relation to each other, a single vane on the second named rotor, said vane having a rounded end and flat sidefaces, but said faces being disposed on angles opposed to each other, soas to form a vane with its maximum thickness at the rounded end, said single vane adapted to enter between the pair of vanes on the" first named rotor and to engage the adjacent fiat surfaces of said vanes, and a pocket formed in the second named rotor on each side of the single-vane into which the pair of vanes enter, said pockets having side walls which taper on the samean'gle as the side faces of the single vane, but in an opposite direction to :formpockets which are widest at the inner ends.

2. In a pump of the character described, a

and the bearings, a rotor secured to said shaft within the housing, a third bearing within the housing, said bearing being disposed on an angle with relation to the other bearings, a second rotor journaled on the third bearing and disposed on an angle to the first named rotor, said rotors having opposed faces, bevelgear teeth formed on said faces and intermeshing at; one point, a plurality of vanes projecting from the respective faces of the rotors, said vanes contacting and telescoping with relation to each other when the rotors are rotating, and an inlet and an exhaust port formed in the housing, said ports being disposed on opposite sides of the point where the bevelgear teeth mesh.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 32,372 Jones et a1 May 21, 1861 351,129 Salomo Oct. 19, 1836 739,207 Nielsen Sept. 15, 1903 764,465 Hendricks July 5, 1904 1,006,546 Groh Oct. 24, 1911 1,056,400 Bylger Mar. 18, 1913 1,091,806 Bylger Mar. 31, 19M 1,376,397 Bylger May 3, 1921 FOREIGN PATENTS Number Country Date 218,560 Great Britain July 10, 1924 610,883 Great Britain Oct. 21, 1948 916,277 France Aug. 19, 1946 

